docker_test: support VADER=Vader to get into failing test
docker_test: support VADER=Vader to get into failing test

neomake/neomake,codeinabox/neomake,bonds/neomake,nerdrew/neomake,bonds/neomake,datanoise/neomake,neomake/neomake,euclio/neomake,nerdrew/neomake,euclio/neomake